That"s a really good question. In truth thisquestion resulted in a an excellent debate among physicistsduring the time of Isaac Newton. Newton thoughtthat light was a currently of tiny particles andother physicists such as Christian Huygens thoughtthat the universe was filled through tiny particlescalled aether particles and also that light was simply awave moving through the aether.
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To make a lengthy story short, it turns outthey"re both kind of wrong... And also they"re bothkind of right. In some instances light sort ofacts like a stream of particles and in others itacts kind of like a wave. Today many physicists(myself included) favor to say that light isneither a particle or a wave... It"s just light.
So, some can say that since light can carryenergy indigenous the sun to the earth it should bematter. Others can say that because you can"thold a bump of irradiate in your hand light isn"tmatter. It all relies on what you average by theword "matter." yet the essential thing toremember is that light doesn"t treatment what girlfriend callit, it will certainly still action the same method no matter what. That"s why in physics we try not to worry toomuch about what things space called and also focus onunderstanding how things actually behave.
Both her class, and the whole of scientific research ishaving this debate. First, some precision. Photonsare no in light, they are light. Irradiate is make upof photons, for this reason one photon is like one unit oflight. Additionally, photons aren"t really matter,although this counts on how you define things.Traditionally civilization say the for something come becalled matter, it needs to have mass and also photonsdon"t really have actually mass... Return this alsodepends on exactly how you define it.
I"ll reduced to climate end, and then explain thecontroversy. Irradiate is a form of electromagneticradiation, i m sorry is a kind of energy. This energyalways comes in distinctive units, which we callphotons. In this way, light is favor a particle,but that still doesn"t have mass, therefore it"s not reallymatter. The way these corpuscle behave though, isvery strange. Sometimes they behave more like awave, choose a ripple moving across a pond.Sometimes castle behave an ext like yes, really solidobjects, like bullets being shot native a gun. Andthe craziest point is that whether lock behave oneway or the other depends greatly on even if it is or notanyone is the town hall them in ~ the time. I cannotexplain this behavior... In reality no one can. Allwe have the right to do as scientists is observe the it is thecase and describe it making use of mathematical laws. Ifyou desire to know an ext about just how we understand this come betrue, there is a renowned physicist by the surname ofRichard Feynman who explains it quite nicely here:clickhere to watch video clip
Now the video clip is a small old, however it"s a goodone and also the regulations of physics, as we understand them, havenot readjusted since those days.
Now I said that even if it is light has a massive or notdepends on her definition, allow me define that.As i said, photons, and also thus light, is energy. Butthere is a well known equation E=mc2 thattells united state that the mass and energy room perfectlyequivalent. E is energy, m is mass and also c is thespeed of irradiate in a vacuum.
girlfriend can convert mass right into energy and energyinto mass. As a matter of fact, that"s what thesun go every day, it converts some of its massinto energy, i m sorry we see as light. And so thereis a perfectly reasonable means to talk about the"mass" the a particle of light. All you do isconvert its power to mass, althoughconventionally we people shot not to perform that thesedays. And also so... Irradiate is energy, yet energy andmass room equivalent. And if you"re asking whetherlight is a particle or a wave... Nobody in theuniverse, the we recognize of, has actually a good answer tothat one.-Yours in Science,
This is a great question! The subject ofphotons deserve to be a an extremely confusing topic also toscientists studying their behavior. Stop startoff by defining what matter is. Matter isgenerally miscellaneous that has actually mass (it has actually weight)and volume. Because that example, a bus is made of matterbecause the is heavy and also takes up space. Now, whatis a photon? A photon is generally considered tobe a “particle” that light, yet this particle isvery special. A photon fragment does not have anymass (because you cannot “weigh” light), so that isnot thought about to it is in matter.
Scientists speak to a bit of light a photonbecause it deserve to carry and pass on power likematter can, yet it also sometimes acts favor awave, together light should. Due to the fact that a photon is aparticle the has really unique abilities thatnormal issue does no have, we can say the lightis not matter.
This is a very deep inquiry at the love ofquantum mechanics, i m sorry is the ar of sciencedescribing matter at a very tiny scale. There isa theory dubbed the "wave-particle duality" thatsays in ~ a quantum scale, us can"t really use whatare called "classical" words such together "wave" or"particle" to define objects. Instead,quantum-scale objects exhibit nature of bothparticles and also waves. In quantum mechanics, thewave-like habits of a particle is encoded in amathematical construct called a "wavefunction"which is "evolved" under an equation called the"Schrodinger equation." The particle-like behavioris linked with measurements, whereby theparticle is compelled to be found in part localizedregion of space. This is all closely related tothe "Heisenberg uncertainty Principle," whichstates the we deserve to never simultaneously recognize boththe specific position and exact momentum of aparticle. I realize this is a lot of jargon, butthe main idea to get from this is that at thequantum scale (where points are very very tiny),light behaves a little like both tide andparticles. I hope this helps!
This is a very interesting question. I will tryto provide you some insight:
No, light is no matter, light is energy, butmatter and energy are related,and in details situations, at really high energiessuch as inside a star orparticle collider, matter can be convert intoenergy and also vice versa.
Photons have actually no mass, yet matter has mass.Photons space "quanta" (tiny bits) ofelectromagnetic energy. Light is very interestingin that it behaves eitherlike waves or favor particles, relying on how youmeasure it. Photons travelall the means across the world at the rate oflight! issue cannot evertravel in ~ the speed of light.
So, we recognize that light cannot *be* matter, atleast not in the kind we know it(gross issue - favor rocks, plants, animals,people, and stuff).
The hatchet "light" is usually used to typical thesmall section of allelectromagnetic radiation that we deserve to see v oureyes, but there is atremendous range of electromagnetic radiation thatgoes from really longwavelengths (radio frequency waves) to extremelyshort, high energy waves(gamma rays). This variety we speak to theElectromagnetic Spectrum.
Light that you deserve to see is not in matter, butall living issue containsenergy. You room warm, right? So your body emitsheat power (we call thisinfra red radiation) and also electrical power becauseof all our mind and nerveimpulses. If girlfriend look at a human being using an infrared camera, you deserve to see thewarmer and also cooler locations of their body.
All planets contain warm energy, too, and also wecan measure their warmth output byobserving castle in infra red, microwave, or radiofrequencies.
But at very high temperature andenergies, matter and radiation becomeinterchangeable. Matter can be convert intoenergy, such together in nuclearfusion. Einstein suspect this in his famousequation E = mc2 where m standsfor mass and also c is the speed of light, and I writec2 to typical "c squared".This takes ar inside stars, and also that is howthey bright - by convert someof their matter to energy
Energy can be converted right into matter in veryextreme conditions, such as in thevery early on universe (we"re talking within thefirst one to three minutes afterthe so-called big Bang). At first, the universewas every radiation. In ~ acertain minute it cooled under so the protonscould condense out of theradiation, and also shortly afterwards it cooled enoughso the electrons couldcondense. But at that time of extreme heat andlight (trillions of degrees,unimaginable!) matter and also antimatter condensed outof the radiation field! So,for a couple of more minutes, there to be an equilibriumreaction going on, that matterand antimatter condensing the end of the radiationfield, and also then recombininginto pure energy, due to the fact that (maybe you have actually heardthis) issue + antimatterannihilate every other into pure energy (photons).
Then, a quick time later, the cosmos cooledenough so the this equilibriumreaction stopped. The last bit of issue andantimatter created out of theradiation, and mutually annihilated every other.Luckily for us, the balancebetween matter and antimatter was no equal, andthere to be extra matter leftover indigenous this last annihilation, and so the iswhy we are right here today!
Here is an additional bit the "extreme" informationthat you can tell her class: Ifyou might magically transform yourself so the youcould journey on a photontraveling across the universe, you would watch thatall the space in prior ofyou would be contracted under to no street atall, and you would notexperience the i of time! Of food youcannot really carry out this, becauseyou are made the matter.
I expect this help you success the debate!Best wishes,
Matter is usually identified as something that hasboth a remainder mass and a volume. Photons haveneither of these so they room not consideredmatter. Once something is moving really fast, closeto the speed of light, the starts to gain extramass due to the fact that of relativity. This is why photons,which move at the rate of light, have mass. Butif the were feasible for a photon to be in ~ rest, itwould have actually no mass. By the way, in Einstein"sfamous equation E=mc2 which states thatmass and energy room the very same thing, the m in theequation is in reality the remainder mass to add this extramass because of relativity.
Sources: 1) http://en.wikipedia.org/wiki/Matter 2)http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass.html
The indigenous "matter" is imprecisely defined, buttraditionally, photons are not matter and light isnot matter, despite the truth that they perform havematter-like properties. The factor why photons arenot normally taken into consideration to be issue are thefollowing:
1 (the key reason). Photons have actually no rest mass,so only have energy while in motion.Traditionally, issue has power (mass) also whennot moving.
2 (secondary reason). Photons room bosons, whichmeans that they aren"t topic to the exclusionprinciples that prevent an ext normal issue frombeing crammed right into each-other. For example, no twoelectrons in the universe can have the samequantum numbers, which includes their places inspace, for this reason in bespeak to have actually multiple electrons inthe exact same space, they all have to have differentenergy states. Photons aren"t prefer that; friend cancram as many identical photons right into whatevervolume you prefer so lengthy as it"s bigger than thephoton"s wavelength.
Now, every one of this may autumn apart when we learnwhat dark issue is. This is where the imprecisionin the meaning of issue comes in, together we reallydon"t have any solid idea however of what dark matterconsists of or what its properties are.
Problems through the definition also come up whenyou start delving deep into quantum mechanics(most that the issue of a proton is also containedin a form of boson dubbed a gluon), or generalrelativity (are black holes matter or are theyenergy?).
Thanks because that the good question; ns am glad thatyour class is having a scientific debate! This isa tricky question, and also I hope that I deserve to help.
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You space correct that light is made the end ofphotons. However, photons room a bit different thanmatter. Sometimes civilization will say that photons are"particles" of light, yet these irradiate "particles"(photons) are much various than the particles ofmatter that make up every one of the objects roughly you.
One major difference between photons and matterparticles (for example, atoms or electrons) isthat photons are entirely made that energy, whileparticles have what is well-known as a "rest mass,"meaning they have a mass as soon as they space not moving.Light top top the other hand have the right to never avoid moving; infact, every light move at exactly the very same speed(light speed: 300,000,000 m/s !)
Please permit us recognize if friend have any furtherquestions about light, or if any other interestingtopics gain raised during your course debate!